package com.wildwolf.project.wildwolf.smack.avatar;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * An implementation of an AvatarCache which store the data of the filesystem.
 */
public class FileAvatarCache implements AvatarCache {

    private File mStoreDir;

    /**
     * Create a FileAvatarCache.
     *
     * @param storedir The directory used to store the data.
     */
    public FileAvatarCache(final File storedir) {
	if (storedir.exists() && !storedir.isDirectory())
	    throw new IllegalArgumentException("The store directory must be a directory");
	mStoreDir = storedir;
	mStoreDir.mkdirs();
    }

    @Override
    public void put(String key, byte[] data) throws IOException {
	File f = new File(mStoreDir, key);
	OutputStream os = new BufferedOutputStream(new FileOutputStream(f));
	try {
	    os.write(data);
	} finally {
	    os.close();
	}
    }

    @Override
    public void put(String key, InputStream in) throws IOException {
	File f = new File(mStoreDir, key);
	OutputStream os = new BufferedOutputStream(new FileOutputStream(f));
	try {
	    byte[] data = new byte[1024];
	    int nbread;
	    while ((nbread = in.read(data)) != -1)
		    os.write(data, 0, nbread);
	} finally {
	    in.close();
	    os.close();
	}
    }

    @Override
    public byte[] get(String key) throws IOException {
	File f = new File(mStoreDir, key);
	InputStream is = new BufferedInputStream(new FileInputStream(f));
	ByteArrayOutputStream bos = new ByteArrayOutputStream();
	try {
	    byte[] data = new byte[1024];
	    is.read(data);
	    bos.write(data);
	} finally {
	    is.close();
	}
	return bos.toByteArray();
    }

    @Override
    public boolean contains(String key) {
	File f = new File(mStoreDir, key);
	return f.exists();
    }
}
